bugThe GNU Hurd - Bugs: bug #25054, Kernel panic with eth-multiplexer


bug #25054: Kernel panic with eth-multiplexer

Submitter:  None
Submitted:  Tue 09 Dec 2008 10:31:05 PM UTC
Category:  GNU Mach Severity:  3 - Normal
Priority:  5 - Normal Item Group:  None
Status:  None Privacy:  Public
Assigned to:  None Originator Name:  antrik
Originator Email:  -email is unavailable- Open/Closed:  Open
Reproducibility:  Intermittent Size (loc):  None
Planned Release:  None Effort:  0.00
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Mon 06 Jul 2009 08:00:18 AM UTC, comment #2: 

Err, even a bogus user-land tool is not supposed to make a kernel
crash.  The zalloc panic can be understood as we do not have quotas &
such, but the reference counter shouldn't have issues.

Samuel Thibault <sthibaul>
Group administrator
Mon 06 Jul 2009 06:51:18 AM UTC, comment #1: 

The kernel panic was caused by a bug in eth-multiplexer, which didn't deallocate the out-of-line data in ds_device_write().
The problem doesn't exist any more.

Zheng Da <zhengda>
Group Member
Tue 09 Dec 2008 10:31:05 PM UTC, original submission:  

Transferring large files (some hundred MB) with NFS or HTTP, when using the
ethernet multiplexer (from zhengda-soc2008-virt-branch in Hurd CVS), regularily

Assertion `object->ref_count > 0' failed in file "../vm/vm_object.c", line 346


This is with gnumach-dbg=2:1.3.99.dfsg.cvs20080708-1

Interestingly, doing the same with a locally built gnumach that contains the
patch enabling promiscuous mode for the network device, produces a zalloc panic
instead. (A quick check with vmstat and ps showed growing memory use by the
multiplexer process, but haven't investigated further.) I wonder whether the
difference is because it's locally built (different toolchain?), or because of
the patch.



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  • -email is unavailable- added by sthibaul (Posted a comment)
  • -email is unavailable- added by zhengda (Posted a comment)

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